Gallium-based liquid metal exhibits a low melting point and remains liquid below room temperature due to its supercooling behavior. Owing to its high electrical conductivity and intrinsic deformability, it is a promising conductive material for flexible and stretchable electronic devices. However, its high surface tension and native oxide layer make interfacial interaction with substrates a critical challenge. Hence, we fabricated stable liquid metal-coated textile electrodes by systematically investigating the interfacial characteristics between liquid metal and textile substrates during a brush-coating process. Both cotton-based natural textiles and polyester-based synthetic textiles with different surface properties are employed. The surface morphology, wetting characteristics, electrical properties, and mechanical stability of the electrodes are comparatively analyzed. Finally, the capacitive performance of the resulting supercapacitors is evaluated using cyclic voltammetry.